77541929 has 2 divisors, whose sum is σ = 77541930. Its totient is φ = 77541928.

The previous prime is 77541923. The next prime is 77541931. The reversal of 77541929 is 92914577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46717225 + 30824704 = 6835^2 + 5552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77541929 is a prime.

Together with 77541931, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77541929.

It is not a weakly prime, because it can be changed into another prime (77541923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38770964 + 38770965.

It is an arithmetic number, because the mean of its divisors is an integer number (38770965).

Almost surely, 2^77541929 is an apocalyptic number.

It is an amenable number.

77541929 is a deficient number, since it is larger than the sum of its proper divisors (1).

77541929 is an equidigital number, since it uses as much as digits as its factorization.

77541929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 44.

The square root of 77541929 is about 8805.7895159946. The cubic root of 77541929 is about 426.4278233408.

The spelling of 77541929 in words is "seventy-seven million, five hundred forty-one thousand, nine hundred twenty-nine".